Effects Of Foliage Application Of Calcium And Sodium Salt On Fruit Firmness And Peel Microstructure Of Processing Tomato

There is dominance of producing processing tomato in the northwestern China. However, there is no main cultivar in the area with good fruit firmness, which often results in serious loss after harvest and before processing. This has been seriously restricted the processing tomato industry. Some researches have showed that application of certain concentration of salt to root can enhance the fruit firmness, but the effect of foliage application of salt on processing tomato has not yet reported. Therefore, this research supposed 6 salinity treatments in the pre-experimental foundation. Such as calcium chloride of 2.0 g/L, 4.0 g/L, 8.0 g/L and sodium chloride of 3.0 g/L, 6.0 g/L, 9.0 g/L, water as the control. The research took processes tomato variety Ligeer 87-5 and Shihong 12 as materials, spraying calcium and sodium salt on the foliage during young fruit and fruit expanding time. Studied effect of the exterior source salt treatment on fruit firmness of processing tomato, fruit quality and the peel microstructure. The results showed that:(1) All treatments on two processing tomato varieties have suppressed PG enzyme activity.(2) Ligeer87-5,calcium chloride of 2.0 g/L and sodium chloride of 3.0 g/L have increased fruit firmness and pressure tolerance. Calcium chloride of 4.0 g/L and 8.0 g/L have increased fruit firmness but decreased pressure tolerance. Sodium chloride of 6.0 and g/L9.0 g/L have decreased fruit firmness and pressure tolerance. Shihong12, calcium chloride of 4.0 g/L and sodium chloride of 3.0 g/L and 6.0 g/L have increased fruit firmness and pressure tolerance. Calcium chloride of 8.0 g/L has increased fruit firmness but decreased pressure tolerance. Calcium chloride of 2.0 g/L and sodium chloride of 9.0 g/L have decreased fruit firmness and pressure tolerance.(3) All treatments on two processing tomato varieties have increased soluble solid,lycopene and so on,enhanced fruit quality.(4) Ligeer87-5, calcium chloride of 4.0 g/L and 8.0 g/L and sodium chloride of 3.0 g/L and 6.0 g/L have increased total yield,but calcium chloride of 2.0 g/L and sodium chloride of...